Introduce a manual test checking for available C++11 features

The plan is to use some interesting C++11 features in the
code base as soon as they are available in all compilers
we need to support.

Change-Id: I725797bdf03c64458f7f2d9b010d1cc2cdf8cdb3
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

2 files changed, 156 insertions, 0 deletions

diff --git a/tests/manual/features/features.pro b/tests/manual/features/features.pro
new file mode 100644
index 0000000000..1534031818
--- /dev/null
+++ b/tests/manual/features/features.pro
@@ -0,0 +1,7 @@
+
+QT += testlib
+
+TARGET = tst_features
+
+SOURCES += tst_features.cpp
+
diff --git a/tests/manual/features/tst_features.cpp b/tests/manual/features/tst_features.cpp
new file mode 100644
index 0000000000..7f59d17ad0
--- /dev/null
+++ b/tests/manual/features/tst_features.cpp
@@ -0,0 +1,149 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include <QtTest>
+#include <QFile>
+#include <QCoreApplication>
+
+enum {
+    Gcc11 = 1,
+    Gcc98 = 2,
+    Clang = 4,
+    Extern = 8,
+
+    First = Gcc11,
+    Last = Extern
+};
+
+struct Data
+{
+    Data()
+    {}
+
+    Data(QByteArray c, uint f = 0)
+        : code(c), expectedFailure(f)
+    {}
+
+    QByteArray code;
+    uint expectedFailure;
+};
+
+Q_DECLARE_METATYPE(Data)
+
+class tst_Features : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_Features() {}
+
+private slots:
+    void feature();
+    void feature_data();
+};
+
+void tst_Features::feature()
+{
+    QFETCH(Data, data);
+
+    QByteArray mainFile = "main.cpp";
+
+    QFile source(mainFile);
+    QVERIFY(source.open(QIODevice::ReadWrite | QIODevice::Truncate));
+    QByteArray fullCode =
+        "#include <vector>\n"
+        "#include <string>\n\n"
+        "using namespace std;\n\n"
+        + data.code + "\n";
+    source.write(fullCode);
+    source.close();
+
+    for (uint i = First; i <= Last; i *= 2) {
+        QByteArray compiler;
+        if (i & Gcc11)
+            compiler = "g++ -Werror -std=c++0x -c";
+        else if (i & Gcc98)
+            compiler = "g++ -Werror -std=c++98 -c";
+        else if (i & Clang)
+            compiler = "clang++ -Werror -std=c++11 -c";
+        else if (i & Extern)
+            compiler = qgetenv("QTC_COMPILER_PATH");
+
+        if (compiler.isEmpty())
+            continue;
+
+        QProcess proc;
+        proc.start(compiler + " " + mainFile);
+        proc.waitForFinished();
+        QByteArray output = proc.readAllStandardOutput();
+        QByteArray error = proc.readAllStandardError();
+        bool compileFailure = proc.exitCode() != 0;
+        bool ok = compileFailure == bool(data.expectedFailure & i);
+        if (!ok) {
+            qDebug() << "\n------------------ CODE --------------------";
+            qDebug() << fullCode;
+            //qDebug() << "\n------------------ CODE --------------------";
+            //qDebug() << ".pro: " << qPrintable(proFile.fileName());
+            qDebug() << "Compiler: " << compiler;
+            qDebug() << "Error: " << error;
+            qDebug() << "Output: " << output;
+            qDebug() << "Code: " << fullCode;
+            qDebug() << "\n------------------ CODE --------------------";
+        }
+        QVERIFY(ok);
+    }
+}
+
+void tst_Features::feature_data()
+{
+    QTest::addColumn<Data>("data");
+
+    // Self-test. "$" should be expected to fail in any case.
+    QTest::newRow("checkfail")
+            << Data("$", -1);
+
+    QTest::newRow("auto-keyword")
+            << Data("auto i = vector<int>::iterator();", Gcc98);
+
+    QTest::newRow("ranged-for")
+            << Data("int foo() { int s = 0; vector<int> v; "
+                    "for (int i: v) { s += v[i]; } return s; }", Gcc98);
+
+    QTest::newRow("in-class-member-initialization")
+            << Data("struct S { int a = 1; }; int main() { S s; return s.a; }", Gcc98);
+}
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    tst_Features test;
+    return QTest::qExec(&test, argc, argv);
+}
+
+#include "tst_features.moc"